Question

Use the equation 2Cu+O2-->2CuO, to find how many grams of copper react to produce 2.44 mol CuO.

Answer 1

According to the equation, the ratio of the reactant Cu and product CuO is 2:2, thus 1:1.  Therefore to produce 2.44 mol CuO, 2.44 mol Cu is required.  The molecular weight of Cu is 64. So the mass of Cu that is required to produce 2.44mol CuO is 2.44mol * 64 g/mol =  156.16 g.

Answer 2

Answer: The amount of copper reacted will be 154.94 g.

Explanation:

For the given chemical reaction:

$2Cu+O_2\rightarrow 2CuO$

By Stoichiometry of the reaction:

2 moles of copper oxide will be formed by 2 moles of copper metal.

So, 2.44 moles of copper oxide will be formed from $\frac{2}{2}\times 2.44=2.44mol$ of copper.

Now, to calculate the mass of copper, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Number of moles of copper = 2.44 moles

Molar mass of copper = 63.5 g/mol

Putting values in above equation, we get:

$2.44mol=\frac{\text{Mass of copper}}{63.5g/mol}\\\\\text{Mass of copper}=154.94g$

Hence, the amount of copper reacted will be 154.94 g.